Gaara - Keep the sand field up for the 40% Wind enhancement. It's true that he doesn't do a lot of damage, but a 40% increase + 40% increase by main + 12% increase from Baki can work very well.
Baki - I've had him do 6.9k damage in PvE before with a heavy Wind enhancement team, with the right setup, you could probably do a lot more damage with him. His increase of 12% to all Wind ninjas seems minor, but it really adds up.
Temari - 3 Star Temari grants 20 Chakra. Her attack is a two part attack but does a ton of damage as long as she has full health.
Asuma - Basic Asuma grants 20 Chakra I think, and so if he's with Temari, you get a large amount of chakra to work with on the first round. If your chakra is at a certain point, his mystery has no cooldown and no chakra cost, so spam it.
Breeze Dancer's Hurricane Jutsu - Consider using this mystery because it uses no chakra and does a high amount of Wind damage, but Giant Rasengan may be better still depending on your set up. I haven't extensively tested what is better, so I can't be sure.
Breeze Dancer's Gust Dance - This will activate 10 hit combo chases easily.
But you may not want to go with elemental damage at all, using taijutsu heavy teams with multiple standard attacks may work out better for you.